McEnroe is a disgraceful legend tbh. He should be guiding Kyrgios through moments like that, not telling the young lad (who has a history of losing his cool) how to lose your cool and then stand over him watching him mock the umpire in silence. Wtf?

It changed nothing, Federer was outplaying Kyrgios regardless of that call. The attitude of both him and McEnroe stunk. I feel sorry for the umpires with the kind of abuse they have to put up with sometimes.

@NickKyrgios yes people will say you need to put bad decisions behind you, but come on, Roger was never going to return Nick's serve and wrong decision made by umpire. Definitely changed the momentum and possibly outcome of match.

Despite some arguing over whether the decision would have changed the course of the set, it’s hard to doubt Federer’s hold on the match after his absolute masterclass.

Besides the controversial moment, the Swiss maestro was barely ruffled as he cruised to a 6-3, 6-2 win over Kyrgios.

“I felt good from the beginning and that’s not usual,” Federer said.

“We need some matches to get going, but today I was very clear in my game plan and I got wonderful support from my team.”

Roger Federer put on a masterclass against Nick Kyrgios at the Laver Cup. Pic: Getty

Kyrgios, the high-spirited Australian, tends to reserve his best for the greats of the game.

He regularly loses to inferior players but is 1-3 against Federer.

And so the game between the two immensely talented players went again, just as it had three weeks ago at the US Open, as Kyrgios was left in awe of the shot selection employed by Federer.

It took just three games for Federer to break Kyrgios in the opening set, but he waited even less in the second, breaking him in his first service game of the second set with a masterful combination of play that kept the crowd in rapture.

That is not to take anything away from Kyrgios, however.

At times, he also was sharp, and sent blitzing passing shots past Federer but the glimpses of brilliance were far too few – including this winner after putting his body on the line:

But by the end of the one-hour and 40-minute encounter, Federer simply proved a superior player.

He only found his rhythm more in the second set to win 22 more winners than Kyrgios and served out the match with an eighth ace.

Zverev powers Europe to a commanding lead

Earlier, Zverev saved a match point to defeat John Isner in day two’s opening singles rubber.